Confidence: I'm as sure as I can be.
Notes: Much more common in gardens and as an escape than true P. orientale. Well sorted out a number of years ago in the Journal of the Royal Horticultural Society but only relatively recently has the revision reached 'Stace' etc. (I like to think that my Wigtownshire checklist was the first recognition of this species as the common escape in the UK, but I am probably wrong.) True P. orientale has less showy, unblotched flowers. P. bracteatum is also in this group and a frequent escape.